Robot vacuum cleaner



1.1 is a front view of a robot vacuum cleaner showing our new design;

1.2 is a rear view thereof;

1.3 is a left view thereof;

1.4 is a right view thereof;

1.5 is a top view thereof;

1.6 is a bottom view thereof;

1.7 is a front, right and top perspective view thereof;

1.8 is a rear, right and top perspective view thereof showing the robot vacuum cleaner in charging; and

1.9 is a rear, right and top perspective view thereof showing the robot vacuum cleaner in another way of charging.

Features shown within the broken lines form no part of the claimed design. 

CLAIM The ornamental design for a robot vacuum cleaner, as shown and described. 